Use & Care Manual
With Installation Instructions for the Installer
®
LISTED
786H
Electric Point of Use
Water Heaters
2½ through 30 Gallon Capacity
120 and 240 Volt Models
The purpose of this manual is twofold: one, to provide the
installer with the basic directions and recommendations for the
proper installation and adjustment of the water heater; and two,
for the owner–operator, to explain the features, operation, safety
precautions, maintenance and troubleshooting of the water heater.
This manual also includes a parts list.
It is imperative that all persons who are expected to install,
operate or adjust this water heater read the instructions carefully
so they may understand how to perform these operations. If you
do not understand these instructions or any terms within it, seek
professional advice.
Any questions regarding the operation, maintenance, service or
warranty of this water heater should be directed to the seller from
whom it was purchased. If additional information is required, refer to
the section on “If you need service.”
Do not destroy this manual. Please read carefully and keep in a
safe place for future reference.
!
!
Recognize this symbol as an indication of Important
Safety Information!
alifornia Proposition 65 Warning: This product contains
C
chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm.
IMPORTANT SAFETY INSTRUCTIONS
WARNING—When using electrical appliances, basic safety precautions to reduce the risk of fire, electric shock, or injury to persons
should be followed, including:
READ ALL INSTRUCTIONS BEFORE USING THIS
WATER HEATER.
The cord and plug connected water heater covered in this
manual (21/2 gallon models) must be grounded. Connect
only to properly grounded outlet. See “Electrical
Connections” section on page 8.
Install or locate this water heater in accordance with the
provided installation instructions.
Use this water heater only for its intended use as
described in this manual.
As with any appliance, close supervision is necessary
when used by children.
Printed in USA
o Not use an extension cord set with this water heater. If
D
no receptacle is available adjacent to the water heater,
contact a qualified electrician to have one properly installed.
Do Not operate this water heater if it has a damaged cord
or plug, if it is not working properly, or if it has been
damaged or dropped.
This water heater should be serviced only by qualified
service personnel. Contact nearest authorized service
center for examination, repair or adjustment.
AVE THESE
S
INSTRUCTIONS
AP16857 (05/13)
Safety Information
Safety Precautions. . . . . . . 3, 4
FOR YOUR RECORDS
Write the model and serial numbers here:
#
#
You can find them on a label on the appliance.
Staple sales slip or cancelled check here.
Installation Instructions
Location. . . . . . . . . . . . . . . . . . 5
Proof of the original purchase date is needed to obtain service under
the warranty.
Water Connections . . . . . . . . . 6
Electrical Connections. . . . . . .8
Operating Instructions
Safety Controls . . . . . . . . . . . 12
Water Temperature . . . . . . . 13
READ THIS MANUAL
Inside you will find many helpful hints on how to use and maintain
your water heater properly. Just a little preventive care on your part
can save you a great deal of time and money over the life of your
water heater.
You’ll find many answers to common problems in the Before You
Call For Service section. If you review our chart of Troubleshooting
Tips first, you may not need to call for service at all.
READ THE SAFETY INFORMATION
Care and Cleaning
Draining. . . . . . . . . . . . . . . . 14
Your safety and the safety of others are very important. There
are many important safety messages in this manual and on your
appliance. Always read and obey all safety messages.
Maintenance. . . . . . . . . . . . . 14
!
Extended Shut-Down. . . . . 14
Troubleshooting Tips
Before You Call
For Service. . . . . . . . . . . . . . 15
This is the safety alert symbol. Recognize this symbol
as an indication of Important Safety Information!
This symbol alerts you to potential hazards that can
kill or hurt you and others.
All safety messages will follow the safety alert symbol and
either the word “DANGER”, “WARNING”, “CAUTION” or
“NOTICE”.
These words mean:
An imminently hazardous situation ! DANGER
that will result in death or serious injury.
!
WARNING
!
CAUTION
Customer Service
Parts List. . . . . . . . . . . . . . 16-18
If You Need Service . . . . . . 19
Wiring Diagram. . . . . . . . . . 20
2
A potentially hazardous situation that could result in death or serious injury and/or damage to property.
A potentially hazardous situation that may result in minor or moderate injury.
Notice:
Attention is called to observe a specified procedure or maintain a specific condition.
IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
WARNING!
WATER TEMPERATURE ADJUSTMENT
Safety and energy conservation are factors to be considered when selecting the water
temperature setting of water heater’s thermostat. Water temperatures above 125°F can cause
severe burns or death from scalding. Be sure to read and follow the warnings outlined on the
label pictured below. This label is also located on the water heater near the thermostat access
panel.
Time/Temperature Relationship in Scalds
!
DANGER
Temperature
Time To Produce a Serious Burn
120°F
125°F
130°F
135°F
140°F
145°F
150°F
155°F
More than 5 minutes
11/2 to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 11/2 seconds
About 1 second
Table courtesy of Shriners Burn Institute
ESE
NOTICE: Mixing valves are available for reducing point
of use water temperature by mixing hot and cold water
in branch water lines. Contact a licensed plumber or the
local plumbing authority for further information.
Reset button
T
R
Children, disabled and elderly are
at highest risk of being scalded.
See instruction manual before
setting temperature at water
heater.
Feel water before bathing or
showering.
Temperature limiting valves are
available, see manual.
The temperature of the water in the heater is
regulated by the adjustable surface mounted
thermostat(s) located behind the jacket access
panel(s). Dual element heaters have two thermostats.
To comply with safety regulations the thermostat(s)
were set at 120°F before the water heater was
shipped from the factory.
ESE
Water temperature over 125° F
can cause severe burns
instantly or death from scalds.
NOTICE: Households with small children, disabled,
or elderly persons may require a 120°F or lower thermostat
setting to prevent contact with “HOT” water.
R
BURN
The chart shown above may be used as a guide
in determining the proper water temperature for your
home.
T
HOT
Thermostat
dial pointer
150°F
(66°C)
Thermostat
protective
cover
90°F
(32°C)
125°F (52°C)
TURN OFF
POWER
BEFORE
SERVICING
The illustration at the left
shows the temperature
adjustment dial used
for setting the water
temperature.
Refer to the Operating
Instructions in this
manual for detailed
instructions in how to
adjust the thermostat(s).
DANGER: Hotter water increases the potential for
Hot Water SCALDS.
3
IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
WARNING!
For your safety, the information in this manual must be followed to minimize the risk of
fire or explosion, electric shock, or to prevent property damage, personal injury, or loss of
life.
Be sure to read and understand the entire Use and Care Manual before attempting
to install or operate this water heater. It may save you time and cost. Pay particular
attention to the Safety Instructions. Failure to follow these warnings could result in
serious bodily injury or death. Should you have problems understanding the instructions
in this manual, or have any questions, STOP, and get help from a qualified service
technician, or the local electric utility.
FOR INSTALLATIONS IN THE STATE OF CALIFORNIA
California Law requires that residential water heaters must be braced, anchored or strapped
to resist falling or horizontal displacement due to earthquake motions. For residential water
heaters up to 52 gallon capacity, a brochure with generic earthquake bracing instructions can be
obtained from: Office of the State Architect, 400 P Street, Sacramento, CA 95814 or you may
call 916-324-5315 or ask a water heater dealer.
However, applicable local codes shall govern installation. For residential water heaters
of a capacity greater than 52 gallons, consult the local building jurisdiction for acceptable
bracing procedures.
SAFETY PRECAUTIONS
Have the installer show you the location of the circuit breaker and how to shut it off if
necessary. Turn off the circuit breaker if the water heater has been subjected to overheating,
fire, flood, physical damage or if the ECO fails to shut off.
● Read this manual entirely before installing
or operating the water heater.
● Use this appliance only for its intended
purpose as described in this Use and Care
Manual.
● DO NOT attempt to repair or replace
any part of your water heater unless it is
specifically recommended in this manual.
All other servicing should be referred to a
qualified technician.
● Be sure your appliance is properly installed
in accordance with local codes and the
provided installation instructions.
READ AND FOLLOW THIS SAFETY INFORMATION
CAREFULLY.
SAVE THESE INSTRUCTIONS
4
Installing the water heater.
The location chosen for the water heater must take into consideration the following:
Local Installation Regulations
This water heater must be installed in
accordance with these instructions, local
codes, utility codes, utility company
requirements or, in the absence of local
codes, the latest edition of the National
Electrical Code. It is available from some
local libraries or can be purchased from
the National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269 as
booklet ANSI/NFPA 70.
Location
This water heater is designed to meet a
wide range of applications. It fulfills a
demand for a small water heater that can
be installed in a limited space such as under
countertops, in cabinets or in a closet.
The water heater and water lines
should be protected from freezing
temperatures. Do not install the water
heater in outdoor, unprotected areas.
Make certain the floor underneath
the water heater is strong enough to
sufficiently support the weight of the
water heater once it is filled with water.
Locate the water heater in a clean dry
area as near as practical to hot water
fixtures, or close to the water faucet most
frequently used.
Locate the water heater in a clean dry area
as near as practical to the area of greatest
heated water demand. Long uninsulated hot
water lines can waste energy and water.
Place the water heater in such a manner
that the thermostat and element access
panels can be removed to permit inspection
and servicing such as removal of elements
or checking controls.
A—Diameter of water
heater plus 2″ min.
B—Maximum 2″
CAUTION: The water heater should not
be located in an area where leakage of
the tank or connections will result in
damage to the area adjacent to it or to lower
floors of the structure. Where such areas
cannot be avoided, it is recommended that a
suitable catch pan, adequately drained, be
installed under the water heater.
B
To open drain, line
should be at least 3/4″ ID
and pitched for proper
drainage.
A
NOTICE: Auxiliary catch pan MUST conform to local codes.
Catch Pan Kits are available from the store where the water heater
was purchased, or any water heater distributor.
Inspect Shipment
Inspect the water heater for possible damage. Check the markings on the rating plate
of the water heater to be certain the power supply corresponds to the water heater
requirements.
5
Installing the water heater.
Thermal Expansion
Determine if a check valve exists in the inlet
water line. It may have been installed in
the cold water line as a separate back flow
preventer, or it may be part of a pressure
reducing valve, water meter or water softener. A
check valve located in the cold water inlet line
can cause what is referred to as a “closed water
system.” A cold water inlet line with no check
valve or back flow prevention device is referred
to as an “open” water system.
As water is heated, it expands in volume and
creates an increase in pressure within the water
system. This action is referred to as “thermal
expansion.” In an “open” water system,
expanding water which exceeds the capacity of
the water heater flows back into the city main
where the pressure is easily dissipated.
A “closed water system,” however, prevents
the expanding water from flowing back into
the main supply line, and the result of “thermal
expansion” can create a rapid and dangerous
pressure increase in the water heater and the
system piping. This rapid pressure increase can
quickly reach the safety setting of the relief
valve, causing it to operate during each heating
cycle. Thermal expansion, and the resulting
rapid and repeated expansion and contraction
of components in the water heater and piping
system can cause premature failure of the relief
valve, and possibly the heater itself. Replacing
the relief valve will not correct the problem.
The suggested method of controlling thermal
expansion is to install an expansion tank in
the cold water line between the water heater
and the check valve. The expansion tank is
designed with an air cushion built in that
compresses as the system pressure increases,
thereby relieving the over pressure condition
and eliminating the repeated operation of the
relief valve. Other methods of controlling
thermal expansion are also available. Contact
your installing contractor, water supplier, or
plumbing inspector for additional information
regarding this subject.
Water Supply Connections
NOTICE: Do not apply
heat to the HOT or COLD
water connections. If sweat
connections are used, sweat tubing
to adapter before fitting adapter
to the water connections on heater.
Any heat applied to the water
supply fittings will permanently
damage the dip tube and/or heat
traps.
6
Refer to the illustrations on the following
page for suggested typical installation. The
installation of unions or flexible copper
connectors is recommended on the hot
and cold water connections so that the
water heater may be easily disconnected
for servicing. Connect cold water supply
line to 3/4” pipe connection near bottom of
water heater on the 6 gallon and 20 gallon
models. Install a shut-off valve and a drain
valve (not supplied with heater, except 2 1/2
gal. models) in cold water line near water
heater. Connect hot water line to 3/4” pipe
connection marked HOT on side near top of
water heater. On the 2 1/2 gallon models,
the hot and cold water connections are 1/2”
pipe connections and are located on top of
the heater. Local codes may require an antisiphon device on the water inlet of a side
connect water heater.
Typical Installation
Recommended
heat trap
6″ minimum
Union
Unions
Anode
Hot water outlet
to fixtures
Temperature &
pressure relief
valve
If required, install per local codes
and valve manufacturer’s
instructions.
Jacket
access
panel
Temperature &
pressure relief
valve
To cold water
supply
Power supply
cord 21/2 gal.
models only
Shut-off valve
Cold water supply
Opening
for 1/2″
or 3/4″
electrical
fitting
Shut-off valve
Relief
valve
discharge line
to suitable
open
drain
Vacuum Relief Valve
(Not Supplied)
Drain valve
(not supplied)
6″ air gap
Auxiliary catch pan drain
line
(use only copper
conductors)
Auxiliary catch pan
Suitable open drain
Drain valve*
Relief
valve
discharge
line
Jacket access
panel
6″
Auxiliary catch
pan drain line
Suitable open drain
Auxiliary
catch pan
Hot water
outlet
(to fixtures)
*The drain valve is located below and to the right of jacket access panel and is
not visible in this view.
A new combination temperature and pressure relief valve, complying with the Standard for Relief
Valves and Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22, is supplied
and must be installed in the opening provided and marked for the purpose on the water heater. No
valve of any type should be installed between the relief valve and the tank. Local codes shall govern the
installation of relief valves.
Relief Valve
WARNING: The pressure
rating of the relief valve must
not exceed 150 PSI, the
maximum working pressure of
the water heater as marked on
the rating plate.
The Btuh rating of the relief valve must
not be less than the input rating of the
water heater as indicated on the rating
label located on the front of the heater
(1 watt=3.412 Btuh).
Connect the outlet of the relief valve to a
suitable open drain so that the discharge
water cannot contact live electrical parts or
persons and to eliminate potential water
damage.
Piping used should be of a type approved
for hot water distribution. The discharge
line must be no smaller than the outlet of
the valve and must pitch downward from
the valve to allow complete drainage (by
gravity) of the relief valve and discharge
line. The end of the discharge line should
not be threaded or concealed and should
be protected from freezing. No valve of
any type, restriction or reducer coupling
should be installed in the discharge line.
To Fill the Water Heater
WARNING: The tank must be full of
water before heater is turned on. The water
heater warranty does not cover damage or
failure resulting from operation with an
empty or partially empty tank.
Make certain the drain valve is completely
closed.
Open the shut-off valve in the cold water
supply line.
Open each hot water faucet slowly to
allow the air to vent from the water heater
and piping.
A steady flow of water from the hot water
faucet(s) indicates a full water heater.
7
Installing the water heater.
Condensation
Condensation can form on the tank when
it is first filled with water. Condensation
might also occur with a heavy water draw
and very cold inlet water temperature.
This condition is not unusual, and will
disappear after the water becomes heated.
If, however, the condensation continues,
examine the piping and fittings for
possible leaks.
Additional information on this subject
may be found at www.rheem.com under
“Library”. Scroll down to the Technical
Service Bulletins 1300 Series Section and
choose Bulletin #1303.
Electrical Connections
CAUTION: The presence of
water in the piping and water
heater does not provide
sufficient conduction for a
ground. Non-metallic piping,
dielectric unions, flexible
connectors etc. can cause the
water heater to be electrically
isolated.
NOTICE: This guide
recommends minimum
branch circuit sizing and
wire size based on National
Electric Code. Refer to
wiring diagrams in this
manual for field wiring
connections.
8
All wiring must conform to local codes or
latest edition of National Electrical Code
ANSI/NFPA 70.
The voltage requirements and wattage load
for the water heater are specified on the
rating plate on the front of the water heater.
21/2 gallon models are supplied with a
plug connected power supply cord for use
only in 120 VAC applications. The cord
must be connected to a properly grounded
receptacle on a branch circuit with copper
conductors, an over current protection
device and a suitable disconnect means.
If desired, straight field wiring connections
can be made to these models by removing
the access cover on front of heater and
disconnecting the cord set from the
thermostat and the grounding plug. Remove
the cord set and strain relief bushing
from the junction bracket. The hole in the
junction bracket will accommodate 1/2″
or 3/4″ electrical fittings. Refer to wiring
diagrams in the back of this manual for
wiring connections.
6 through 30 gallon models are completely
wired to the junction bracket inside jacket
at front of water heater. An opening for
1/2″ or 3/4″ electrical fitting is provided
for field wiring connections. A separate
branch circuit with copper conductors,
overcurrent protective device and suitable
disconnecting means must be provided
by a qualified electrician. Refer to wiring
diagrams in the back of this manual for
wiring connections.
The branch circuit wiring should include
either:
etallic conduit or metallic sheathed
M
cable approved for use as a grounding
conductor and installed with fittings
approved for the purpose.
Non-metallic sheathed cable, metallic
conduit or metallic sheathed cable
not approved for use as a ground
conductor shall include a separate
conductor for grounding. It should be
attached to the ground terminals of
the water heater and the electrical
distribution box.
Branch Circuit Sizing and Wire Size Guide
Total Water
Heater Wattage
Recommended Over Current Protection (fuse or circuit breaker amperage rating)
Copper Wire Size AWG Based
on N.E.C. Table 310-16 (75°C.)
120V208V240V
120V
208V
240V
1500*
201515
12
14
14
1700
201515
12
14
14
2000
251515
10
14
14
2500
301515
10
14
14
3000
352020
8
12
12
3500
–­
25
20
–
10
12
3800
–
25
20
–
10
12
4000
–
25
25
–
10
10
4500
–
30
25
–
10
10
5000
–
30
30
–
10
10
5500
–
35
30
–
8
10
6000
–
40
35
–
8
8
9000
–
–
50
–
–
8
*Less than 1500 watts may be wired 14 gauge with 15 amp protection. Check Local Electrical Codes, as they will also apply.
Insulation Blankets
WARNING: If local
codes require external
application of insulation
blanket kits the
manufacturer’s instructions
included with the kit must
be carefully followed.
Insulation blankets, available to the
general public, for external use on electric
water heaters are not necessary. The
purpose of an insulation blanket is to
reduce the standby heat loss encountered
with storage tank heaters. This water
heater meets or exceeds the National
Appliance Energy Conservation Act
standards with respect to insulation and
standby loss requirements making an
insulation blanket unnecessary.
The manufacturer’s warranty does not
cover any damage or defect caused by
installation, attachment or use of
any type of energy saving or other
unapproved devices (other than those
authorized by the manufacturer) into, onto
or in conjunction with the water heater.
The use of unauthorized energy saving
devices may shorten the life of the water
heater and may endanger life and property.
CAUTION: If local codes require the
application of an external insulation
blanket to this water heater, pay careful
attention to the following so as not to
restrict the proper function and
operation of the water heater:
 DO NOT cover the operating or
warning labels attached to the water
heater or attempt to relocate them on
the exterior of insulation blanket.
 DO NOT apply insulation to the top of
the water heater. This could interfere
with the safe operation of the electrical
junction box.
 DO NOT cover the jacket access
panel(s) to the thermostat(s) and heating
element(s), or pressure and temperature
relief valve.
 Inspect the insulation blanket frequently.
The manufacturer disclaims any
responsibility for such loss or injury
resulting from the use of such
unauthorized devices.
Hot and Cold Pipe Insulation Installation
Typical vertical piping
arrangement
Typical horizontal piping
arrangement
For increased energy efficiency, some
water heaters have been supplied with
two 24” sections of pipe insulation.
Please install the insulation, according
Typical side piping
arrangement
to the illustrations above, that best meets
your requirements.
9
Installing the water heater.
Relief Valve Insulation Installation
CAUTION: Ensure the
T&P Valve opening is not
obstructed by the insulation.
Typical top connection arrangement
Typical side connection arrangement
For increased energy efficiency, some
water heaters have been supplied with
a 2-3/8” section of pipe insulation.
Slip the insulation cover over the T&P
Valve through the center hole and align
the hole in the side with the opening of
the T&P Valve.
Please install the insulation, according
to the illustrations above, that best meets
your requirements.
Heat Trap
For increased energy efficiency, some
water heaters have been supplied with
factory installed internal or external heat
traps in the hot outlet and cold water inlet
openings.
10
NOTICE: Do not apply heat to the HOT
or COLD water connections. If sweat
connections are used, sweat tubing to
adapter before fitting adapter to the water
connections on heater. Any heat applied to
the water supply fittings will permanently
damage the dip tube and/or heat traps.
Installation Checklist
A. Water Heater Location
❑ Close to area of heated water demand.
❑ Indoors and protected from freezing temperatures.
❑ Area free of flammable vapors.
❑ Provisions made to protect area from water ❑ Sufficient room to service heater.
damage.
B. Water Supply
❑ Water heater completely filled with water.
❑ Air purged from water heater and piping.
❑ Water connections tight and free of leaks.
C. Relief Valve
❑ Temperature and Pressure Relief Valve properly installed and discharge line run to open drain.
❑ Discharge line protected from freezing.
D. Wiring
❑Power Supply voltage agrees with water
heater rating plate.
❑Branch circuit wire and fusing or circuit
breaker of proper size.
❑Electrical connections tight and unit properly
grounded.
11
Operating the water heater.
CAUTION: Hydrogen gas can be produced in a hot water system served by this water heater that has not been used for a
long period of time (generally two weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE!! To dissipate such
gas and to reduce risk of injury, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink
before using any electrical appliance connected to the hot water system. If hydrogen is present, there will be an unusual sound
such as air escaping through the pipe as the water begins to flow. Do not smoke or use an open flame near the faucet at the
time it is open.
Safety Precautions
O turn off power to water heater if
D
it has been subjected to over heating,
fire, flood, physical damage.
O NOT turn on water heater unless
D
it is filled with water.
O NOT turn on water heater if cold
D
water supply shut-off valve
is closed.
I f there is any difficulty in
understanding or following the
Operating Instructions or the
Care and Cleaning section, it is
recommended that a qualified person
or serviceman perform the work.
Safety Controls
CAUTION: The cause
of the high temperature
condition must be investigated
by qualified service technician
and corrective action must
be taken before placing the
water heater in service again.
The water heater is equipped with a
combination thermostat and temperature
limiting control (ECO) that is located
above the heating element in contact with
the tank surface. If for any reason the water
temperature becomes excessively high, the
temperature limiting control (ECO) breaks
the power circuit to the heating element.
Once the control opens, it must be reset
manually.
To reset the temperature limiting control:
Turn off the power to the water
heater.
emove the jacket access panel(s)
R
and insulation.
The thermostat protective cover
should not be removed.
Press the red RESET button.
eplace the insulation and jacket
R
access panel(s) before turning on the
power to the water heater.
Emergency Instructions
WARNING: If the water heater has been
subjected to flood, fire, or physical damage,
turn off power and water to the water
heater.
DO NOT operate the water heater again
until it has been thoroughly checked by
qualified service personnel.
12
Water Temperature Setting
DANGER: There is a hot
water scald potential if the
thermostat is set too high.
Households with small
children, disabled, or elderly
persons may require a 120°F
or lower thermostat setting to
prevent contact with HOT
water.
The temperature of the water in the water
heater can be regulated by setting the
temperature dial of the adjustable surface
mounted thermostat(s) located behind the
jacket access panel(s).
Dual element heaters have two
thermostats.
Water temperatures above 125°F
can cause severe burns or death from
scalding. Be sure to read and follow the
warnings outlined in this manual and on
the label on the water heater. This label
is located on the water heater near the
thermostat access panel.
Safety and energy conservation are factors
to be considered when selecting the water
temperature setting of the water heater’s
thermostat(s). The lower the temperature
setting, the greater the savings in energy
and operating costs.
Mixing valves are available for reducing
point of use water temperature by mixing
hot and cold water in branch water
lines. Contact a licensed plumber or the
local plumbing authority for further
information.
To comply with safety regulations the
thermostat(s) are factory set at 120°F or
less where local codes require. This is the
recommended starting point.
The chart below may be used as a guide in
determining the proper water temperature
for your home.
Time/Temperature Relationship in Scalds
Temperature
Time To Produce a Serious Burn
120°F
125°F
130°F
135°F
140°F
145°F
150°F
155°F
More than 5 minutes
11/2 to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 11/2 seconds
About 1 second
Table courtesy of Shriners Burn Institute
R
ESE
T
T
R
Reset button
ESE
If adjustment is necessary…
Thermostat
dial pointer
150°F
(66°C)
Thermostat
protective
cover
90°F
(32°C)
125°F (52°C)
TURN OFF
POWER
BEFORE
SERVICING
Turn off the power to the water
heater.
emove the jacket access panel(s)
R
and insulation exposing the
thermostat(s).
The thermostat protective cover(s)
should not be removed.
sing a small screwdriver, set the
U
thermostat(s) dial pointer(s) to
the desired temperature.
eplace the insulation and jacket
R
access panel(s). Turn on the power to
the water heater.
Type 59T thermostat and
protective cover.
13
Care and cleaning of the water heater.
Draining the Water Heater
CAUTION: Shut off power to the water
heater before draining water.
DANGER: Before manually operating
the relief valve, make certain no one will be
exposed to the hot water released by the
valve. The water drained from the tank may
be hot enough to present a scald hazard and
should be directed to a suitable drain to
prevent injury or damage.
In order to drain the water heater, turn off
the cold water supply. Open a hot water
faucet or lift the handle on the relief valve
to admit air to the tank.
Attach a garden hose to the drain valve on
the water heater and direct the stream of
water to a drain. Open the valve.
Routine Preventative Maintenance
DANGER: Before
manually operating the relief
valve, make certain no one will
be exposed to the danger of
coming in contact with the hot
water released by the valve.
The water may be hot enough
to create a scald hazard. The
water should be released into a
suitable drain to prevent
injury or property damage.
NOTICE: If the temperature
and pressure relief valve
on the hot water heater
discharges periodically,
this may be due to thermal
expansion in a closed water
system. Contact the water
supplier or your plumbing
contractor on how to correct
this. Do not plug the relief
valve outlet.
Properly maintained, your water heater
will provide years of dependable troublefree service.
It is suggested that a routine preventive
maintenance program be established and
followed by the user.
It is further recommended that a periodic
inspection of the operating controls,
heating element and wiring should be
made by service personnel qualified in
electric appliance repair.
Most electrical appliances, even when
new, make some sound when in operation.
If the hissing or singing sound level
increases excessively, the electric heating
element may require cleaning. Contact a
qualified installer or plumbing contract to
inspect.
At least once a year, lift and release the
lever handle on the temperature pressure
relief valve, located near the top of the
water heater, to make certain the valve
operates freely. Allow several gallons to
flush through the discharge line to an open
drain.
A water heater’s tank can act as a setting
basin for solids suspended in the water.It
is therefore not uncommon for hard water
deposits to accumulate in the bottom of the
tank. It is suggested that a few quarts of
water be drained from the water heater’s
tank every month to clean the tank of these
deposits.
Rapid closing of faucets or solenoid
valves in automatic water using appliances
can cause a banging noise heard in a
water pipe. Strategically located risers in
the water pipe system or water hammer
arresting devices can be used to minimize
the problem.
The anode rod should be removed from the
water heater’s tank annually for inspection
and replaced when more than 6″ of core
wire is exposed at either end of the rod.
Make sure the cold water supply is turned
off before removing anode rod.
NOTICE: Do not remove the anode rod
from the water heater’s tank, except for
inspection and/or replacement, as operation
with the anode rod removed will shorten
the life of the glass lined tank and will
exclude warranty coverage.
Vacation and Extended Shut-Down
NOTICE: Refer to the
Hydrogen Gas Caution in the
Operating Instructions.
If the water heater is to remain idle for an
extended period of time, the power and
water to the appliance should be turned off
to conserve energy and prevent a build-up
of dangerous hydrogen gas.
The water heater and piping should be
drained if they might be subjected to
freezing temperatures.
14
After a long shut-down period, the
water heater’s operation and controls
should be checked by qualified service
personnel. Make certain the water heater
is completely filled again before placing it
in operation.
Before You Call For Service…
Troubleshooting Tips
Save time and money! Review the chart on this
page first and you may not need to call for service.
Problem
Possible Causes What To Do
Rumbling noise
Water conditions in your
home caused a build up of
scale or mineral deposits
on the heating elements.
●Remove and clean the heating elements.
Relief valve
Pressure build up caused
●This is an unacceptable condition and must be
producing popping
by thermal expansion corrected. Contact the water supplier or plumbing
noise or draining
in a closed system. contractor on how to correct this. Do not plug the
relief valve outlet.
Rattling noise
during periods
of water usage
Internal heat trap
●This is normal for heat trap fittings when in operation
fittings in operation. and does not indicate a need for service.
Not enough or
no hot water
Water usage may have
●Wait for the water heater to recover after an abnormal
exceeded the capacity demand.
of the water heater.
A fuse is blown or a circuit
breaker tripped.
●Replace fuse or reset circuit breaker.
Electric supply may be off.
●Make sure electric supply to water heater and
disconnect switch, if used, are in the ON position.
The thermostat may ●See the Temperature regulation of the water heater
be set set too low. section of this manual.
Leaking or open hot water faucets.
●Make sure all faucets are closed.
Electric service to your home may be interrupted.
●Contact the local electric utility.
Improper wiring.
●See the Installing the water heater section of this
manual.
Manual reset limit (ECO)
●See the Temperature regulation of the water heater
section of this manual.
Cold water inlet ●This is normal. The colder inlet water takes longer
temperature may be to heat.
colder during the
winter months.
Water is too hot
The thermostat ●See the Temperature regulation of the water heater
is set too high. section of this manual.
CAUTION: For your safety DO NOT attempt repair of electrical wiring, thermostats, heating elements or other safety
devices. Refer repairs to qualified service personnel.
15
Replacement Parts.
For 21/2 gallon models with single elements.
Instructions For Placing a Parts Order
Address parts orders to the distributor or
store where the heater was purchased.
All parts orders should include:
he model and serial number of the
T
water heater from the rating plate.
pecify voltage and wattage as
S
marked on the rating plate.
art description (as noted below) and
P
number of parts desired.
CAUTION: For your safety DO NOT
attempt repair of electrical wiring,
thermostat(s), heating elements or other
operating controls. Refer repairs to qualified
service personnel.
21/2 Gallon Models
Relief valve
Cavity insulation
Thermostat
protective cover
Thermostat
T
E S
E
E
R
R
S E
T
09
041
001
031
011
CS
Jacket
access
panel
ID-
021
O-
MR
EH
T
Electrical cord
set (120 VAC
models only)
FFO
N
RE RUT
W
ER OP
O
GN FEB
ICI
VR
ES
Heating
element
gasket
Thermostat
bracket
16
Heating
element
Drain valve
shroud
Drain valve
For 6, 10, 20 gallon models with single elements.
Instructions For Placing a Parts Order
Address parts orders to the distributor or
store where the heater was purchased.
All parts orders should include:
he model and serial number of the
T
water heater from the rating plate.
pecify voltage and wattage as
S
marked on the rating plate.
art description (as noted below) and
P
number of parts desired.
CAUTION: For your safety DO NOT
attempt repair of electrical wiring,
thermostat(s), heating elements or other
operating controls. Refer repairs to qualified
service personnel.
6, 10 and 20 Gallon Models
Anode rod
Shroud
Snap
bushing
Thermostat
Thermostat protective cover
Cavity insulation
Relief valve
S E
T
R
E
R
E
T
S E
90
140
100
130
110
120
TH
Nipple, hot
outlet
Shroud
Nipple, cold
inlet
ER
M-
O-D
ISC
OFF
TURN R
POWE E
BEFOR
CING
SERVI
Jacket
access
panel
Thermostat
bracket
Heating element
Heating element gasket
17
Replacement Parts
For 30 gallon models with single and double elements.
Instructions For Placing a Parts Order
Address parts orders to the distributor or
store where the heater was purchased.
art description (as noted below) and
P
number of parts desired.
All parts orders should include:
CAUTION: For your safety DO NOT
attempt repair of electrical wiring,
thermostat(s), heating elements or other
operating controls. Refer repairs to qualified
service personnel.
he model and serial number of the
T
water heater from the rating plate.
pecify voltage and wattage as
S
marked on the rating plate.
30 Gallon Models
Heating element
gasket
(double element
models only)
Temperature & pressure
relief valve
(not installed)
Heating element
(double element
Upper Thermostat
models only)
(double element models only)
Thermostat bracket
(double element models only)
Anode
Thermostat
protective cover
(double element
models only)
R
Cavity insulation
E
SE T
SE T
130
RE
90
140
100
120 110 O - D I
MER
SC
TH
J-Tube, Hot outlet
R
OFF
TURN ER
POW RE
BEFO
ICING
SERV
E
SE T
140
130
RE
Shroud
Thermostat
(single element models only)
SE T
90
100
120 110 O - D I
MER
SC
TH
Jacket
access
panels
90
140
130
TH
120
M
ER
100
110 D I S C
-O
OFF
TURN ER
POW RE
BEFO
ICING
SERV
Cold Nipple
Heating element
gasket
Heating element
18
Thermostat
bracket
Cavity insulation
Thermostat
protective
Lower Thermostat
(double element models only) cover
IF YOU NEED SERVICE
1. Should you have any questions about your new water heater, or if it requires
adjustment, repair, or routine maintenance, it is suggested that you first contact
your installer, plumbing contractor or previously agreed upon service agency. In
the event the firm has moved, or is unavailable, refer to the telephone directory,
commercial listings or local utility for qualified service assistance.
2. Should your problem not be solved to your complete satisfaction, you should
then contact the Manufacturer’s National Service Department at the following
address:
Rheem Manufacturing Co.
Water Heater Division
1241 Carwood Court
Montgomery, Alabama 36117
Phone: 1-866-279-4566
When contacting the manufacturer, the following information will be requested:
a. Model and serial number of the water heater as shown on the rating plate attached
to the jacket of the heater.
b. Address where the water heater is located and physical location.
c. Name and address of installer and any service agency who performed service on
the water heater.
d. Date of original installation and dates any service work was performed.
e. Details of the problems as you can best describe them.
f. List of people, with dates, who have been contacted regarding your problem.
19
Wiring diagrams.
Therm-O-Disc
Thermostats (Type 59T)
* Grounding conductor may be required.
Refer to Wiring Section of Manual
UPPER THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
3
1
3
2
2
4
2
4
1
4
1
HEATING
ELEMENT
2
2
SINGLE ELEMENT
1
BLACK
HEATING
ELEMENT
FIG. C
SINGLE ELEMENT
1
3
2
4
1
1
2
2
BLACK
120 V Plug Connected
Cord Set ONLY
2
BLACK
WHITE
1
LOWER
HEATING
ELEMENT
FIG. D
JUNCTION BOX
UPPER
HEATING
ELEMENT
LOWER
THERMOSTAT
& HIGH TEMP
LIMIT (ECO)
LOWER
THERMOSTAT
THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
2
RED
TO PROPERLY GROUNDED
RECEPTACLE ON BRANCH CIRCUIT
TO ELECTRICAL DISTRIBUTION
PANEL
LOWER
HEATING
ELEMENT
FIG. E
THIS ELECTRIC WATER HEATER IS WIRED AS INDICATED ABOVE
20
RED
BLACK
JUNCTION
BOX
N
BLACK
G*
RED (10 GA)
YELLOW
UPPER
HEATING
ELEMENT
H
RED
(10 GA)
1
120 V ONLY
SINGLE ELEMENT
L2
BLACK
(10 GA)
JUNCTION
BOX
L1
BLUE
HEATING
ELEMENT
4
G* L2
1
YELLOW
BLACK
BLACK
2
2
L1
THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
BLACK (10 GA)
1
3
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
BLUE
WHITE
2
1
RED
THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
BLACK
1
DOUBLE ELEMENT
SIMULTANEOUS OPERATION
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
G* L2
BLACK
JUNCTION
BOX
L1
BLACK
Wiring Diagrams
Therm-O-Disc
Thermostats (Type 59T)
N
RED
G*
H
DOUBLE ELEMENT
NON-SIMULTANEOUS
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
JUNCTION
BOX
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
UPPER THERMOSTAT
& HIGH TEMP. LIMIT (ECO)
FIG. B
RED
FIG. A
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